Boiler



(No Model.)

C. W. BAKER. BOILER.

Patented Apr. 28, 1896.

m l QNCDN@ WZ l tubes, they being-held or supportedin such position or relation tothe` tubes by.bridge NWB ArENr f i scura.

SISECIFICATION forming partof Letters Patent No. 559,021, dated April 28, 1896.

Application ile'd April 28 J,1894. Serial Noi 509 394. (No model.)

l To all whom it may concern.'

-its object to deflect .the heated gases, cause them to impinge against the boiler-tubes in succession, and cause said tubes to be heated by radiation, as fully set forth hereinafter,

and illustrated in the accompanying drawmy improvements.

ings, wherein- -Y Figure l represents in Vertical sectional elevation part of a boiler-furnace, illustrating Fig. 2 'is an end View, enlarged, of the Water-tubes of the boiler and radiators. Fig. 3 is a side View of two of the boiler-tubes, together with one of the radiators and its supporting bridge-pieces. Fig.

V4 is a detail view of one form of bridge-piece,

and Fig. 5 is a side View thereof. Figs. 6 and 7 are detail side views, enlarged, of a slightlymodified form of radiator; and. Fig. 8 is a roW whenever it is desired to leave spaces atV p similar substance.

front view of the form of bridge-piece employed between tubes in the same horizontal the. sides of the tubes for access in cleaning. Fig. `9 is a detail view, partly in section, and showing the manner in which the bridge-piece of Fig. 8 supports the radiatorsbetween tubes. The tubes of the boiler in which my improvements are used may be arranged in any desired manner and any required distance apart, and they are held or supported at their ends in -any of the ordinary well-known ways. In order-that the tubes may be most eectually heated and to cause impingement of the gases against all of. the tubes, as well as to cause the heat t'o be radiated and deflected, I employ between the tubes, and preferably lengthwise thereof, suitable radiatingv and dey fleet-ing bodies S, which may be of any suitable refractory material, but which I prefer,- ably form of terracotta,iirebrick, or other 3 of the drawings, these radiators S arelaid in rows and are disposed on each pair of the As shown in Figs..2 andv pieces t', which span the spaces between the tubesvand rest on adjacent tubes and are placed at joints between the radiators. These.

radiators S have each four radiating-flanges,

as shown, and the bridge-pieces fr) span the space between the tubes and are placed at joints between the radiat rs. These bridgepieces may be of any desired design, but they are of less width at their lower ends than at vtheir upper ends, said lower ends being narrdw enough to be inserted between the tubes, while theV upper ends are wider than the spaces between the tubes. The side `edges of the bridge-pieces are preferably formed concave and'Jare adapted to conform to the eontour of the tubes upon which they bear.

IThe ends of the radiators S are formed with projections w', adapted to fit into recesses which extendfrom the upper Iredge of the bridge-pieces i. These recesses are so arranged that the radiators are held centrally of the spaces between the tubes tout of con tact therewith and no lateral movement of the radiators is permitted.- L l In the modifications illustrated in Figs. 7 to\` 9 the radiators consist .of iiat plates S', w ich are arranged vertically between the tu es. The bridge -pieces z' illustrated in these modifications are slightly different in design, but otherwise they arethe same in construction as the bridge-plates 1I.

Without limiting myself to the exact c011- struction and arrangement'of the parts shown anddescribed, what I claim is I." In a water-tube boiler, the combination` with the tubes of said boiler, of radiating and deiiecting bodies, and bridge-pieces spanning y the spaces between the tubes and supporting said radiating and delecting bodies, said bridge-pieces having their side edges formed to conform to the contour of the boilerftubes, substantially as described.

3. In a water-tube boiler, the 'combination with the tubes of said boiler, of bridge-pieces IOO spanning the spaces between the tu'bes, the lower ends of said bridge-pieces being narrower than their upper ends, and radiating and deilecting bodies supported upon said bridge-pieces, substantially as described.

4. In a Water-tube boiler, the combination with the tubes of said boiler, of recessed bridge-pieces spanning the spaces between the tubes, and radiating and defiecting bodies engaging the recesses of the bridge-pieces, substantially as described. i

5. In a Water-tube boiler, the combination with the tubes of said boiler, of recessed bridge-pieces spanning the spaces between the tubes, and radiating-bodies provided with projections adapted to be received into the recesses of the bridge-pieces, substantially as described.

6. In a Water-tube boiler, the combination with the tubes of said boiler, of radiating bodies of refractory material arranged in the spaces between the tubes out of contact therewith, and bridge-pieces spanning the spaces between the tubes for supporting the radiating-bodies, substantially as described.

7. In a Water-tube boiler, the combination with the tubes of said boiler, of radiating and deflecting bodies each having four radiating-l iianges, substantially as described.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing Witnesses.

CHARLES NVIIITIN G BAKER.

Vitnesses M. N. BAKER, A. B. GILBERT. 

